I don't think that there are too many casino review websites, because I've never seen a single trusted and objective one. I guess it would be nice to have a website where people could leave rates and comments about their experience with various casinos. I site with some nice classification, pros and cons of the top casinos and the lists of the best ones in various categories would actually be very nice.
I believe there are so many casino review websites out there, but indeed most of them are subjective review. The review made by the owner of the site which the main purpose of the websites is to gain referrals.
A site where you can give rate/comment is Askgambler.com IIRC, I think askgambler is one of the best review sites.
Let's talk about this website. It looks okay, but the casinos reviewed are questionable. Firstly, why bitcoin casinos and not 'crypto casinos'? Many of them accept various cryptocurrencies and some are even based on ethereum platform.
Most casino review sites are indeed using "bitcoin" instead of "crypto" on its name, simply because bitcoin is much more popular word than crypto itself IMO.
Secondly, I never even heard about the casinos listed as best. Where's fortunejack? Crypto-games.net? Primedice?
Most of them are fiat based online casino, it seems that the owner of this website is not even really focusing on pure bitcoin casinos. I have to agree, that all the listed casinos in this site cant be categorized as "best" as most of them are not really popular.
Thirdly, why is there nothing about betcoin.ag not paying jackpot to a winner in the section that reviews this casino?
As I mentioned before, review is subjective. Owner is free to write everything as well as not to write something because the main purpose is to gain referrals.